<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
<%@ page import="java.util.*,java.io.*" %>
<%@ page import="java.text.SimpleDateFormat" %>
<%@ page import="org.json.simple.*" %>

<%

	/**
	 * KindEditor JSP
	 */

//根目录路径，可以指定绝对路径，比如 /var/www/attached/
	String rootPath = pageContext.getServletContext().getRealPath("/") + "attached/";
//根目录URL，可以指定绝对路径，比如 http://www.yoursite.com/attached/
	String rootUrl  = request.getContextPath() + "/attached/";
//图片扩展名
	String[] fileTypes = new String[]{"gif", "jpg", "jpeg", "png", "bmp"};

	String dirName = request.getParameter("dir");
	if (dirName != null) {
		if(!Arrays.<String>asList(new String[]{"image", "flash", "media", "file"}).contains(dirName)){
			out.println("Invalid Directory name.");
			return;
		}
		rootPath += dirName + "/";
		rootUrl += dirName + "/";
		File saveDirFile = new File(rootPath);
		if (!saveDirFile.exists()) {
			saveDirFile.mkdirs();
		}
	}
//根据path参数，设置各路径和URL
	String path = request.getParameter("path") != null ? request.getParameter("path") : "";
	String currentPath = rootPath + path;
	String currentUrl = rootUrl + path;
	String currentDirPath = path;
	String moveupDirPath = "";
	if (!"".equals(path)) {
		String str = currentDirPath.substring(0, currentDirPath.length() - 1);
		moveupDirPath = str.lastIndexOf("/") >= 0 ? str.substring(0, str.lastIndexOf("/") + 1) : "";
	}

//排序形式，name or size or type
	String order = request.getParameter("order") != null ? request.getParameter("order").toLowerCase() : "name";

//不允许使用..移动到上一级目录
	if (path.indexOf("..") >= 0) {
		out.println("Access is not allowed.");
		return;
	}
//最后一个字符不是/
	if (!"".equals(path) && !path.endsWith("/")) {
		out.println("Parameter is not valid.");
		return;
	}
//如果页面上报错目录不存在，可以在这里打断点看看是不是能走到这一步,请自行在在WebRoot目录下创建attached文件夹
//目录不存在或不是目录
	File currentPathFile = new File(currentPath);
	if(!currentPathFile.isDirectory()){
		out.println("Directory does not exist.");
		return;
	}

//遍历目录取的文件信息
	List<Hashtable> fileList = new ArrayList<Hashtable>();
	if(currentPathFile.listFiles() != null) {
		for (File file : currentPathFile.listFiles()) {
			Hashtable<String, Object> hash = new Hashtable<String, Object>();
			String fileName = file.getName();
			if(file.isDirectory()) {
				hash.put("is_dir", true);
				hash.put("has_file", (file.listFiles() != null));
				hash.put("filesize", 0L);
				hash.put("is_photo", false);
				hash.put("filetype", "");
			} else if(file.isFile()){
				String fileExt = fileName.substring(fileName.lastIndexOf(".") + 1).toLowerCase();
				hash.put("is_dir", false);
				hash.put("has_file", false);
				hash.put("filesize", file.length());
				hash.put("is_photo", Arrays.<String>asList(fileTypes).contains(fileExt));
				hash.put("filetype", fileExt);
			}
			hash.put("filename", fileName);
			hash.put("datetime", new SimpleDateFormat("yyyy-MM-dd HH:mm:ss").format(file.lastModified()));
			fileList.add(hash);
		}
	}

	if ("size".equals(order)) {
		Collections.sort(fileList, new SizeComparator());
	} else if ("type".equals(order)) {
		Collections.sort(fileList, new TypeComparator());
	} else {
		Collections.sort(fileList, new NameComparator());
	}
	JSONObject result = new JSONObject();
	result.put("moveup_dir_path", moveupDirPath);
	result.put("current_dir_path", currentDirPath);
	result.put("current_url", currentUrl);
	result.put("total_count", fileList.size());
	result.put("file_list", fileList);

	response.setContentType("application/json; charset=UTF-8");
	out.println(result.toJSONString());
%>
<%!
	public class NameComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable)a;
			Hashtable hashB = (Hashtable)b;
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String)hashA.get("filename")).compareTo((String)hashB.get("filename"));
			}
		}
	}
	public class SizeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable)a;
			Hashtable hashB = (Hashtable)b;
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				if (((Long)hashA.get("filesize")) > ((Long)hashB.get("filesize"))) {
					return 1;
				} else if (((Long)hashA.get("filesize")) < ((Long)hashB.get("filesize"))) {
					return -1;
				} else {
					return 0;
				}
			}
		}
	}
	public class TypeComparator implements Comparator {
		public int compare(Object a, Object b) {
			Hashtable hashA = (Hashtable)a;
			Hashtable hashB = (Hashtable)b;
			if (((Boolean)hashA.get("is_dir")) && !((Boolean)hashB.get("is_dir"))) {
				return -1;
			} else if (!((Boolean)hashA.get("is_dir")) && ((Boolean)hashB.get("is_dir"))) {
				return 1;
			} else {
				return ((String)hashA.get("filetype")).compareTo((String)hashB.get("filetype"));
			}
		}
	}
%>